Cho SR, Tisnado J, Cockrell CH, Beachley MC, Fratkin MJ, Henry DA.
Department of Radiology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298.
Radiographics. 1987 Jul;7(4):729-45.
Pulmonary embolism is an uncommon cause of a massive unilateral lung scan perfusion defect; other causes may mimic PE clinically. Angiography may, therefore, be essential for accurate diagnosis.